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  3. Bad teeth can be painful—and worse. They can even be deadly. Infections of the gums and teeth can release bacteria into the bloo

Bad teeth can be painful—and worse. They can even be deadly. Infections of the gums and teeth can release bacteria into the bloo

admin2013-03-11  29
问题     Bad teeth can be painful—and worse. They can even be deadly. Infections of the gums and teeth can release bacteria into the blood system. Those bacteria can increase the chances of a heart attack or stroke and worsen the effects of other diseases. And adults are not the only ones at risk. For example, in 2007, doctors in the Washington area said a boy died when a tooth infection spread to his brain. They said it might have been prevented had he received the dental care he needed. He was 12 years old.
    Experts at the National Institutes of Health say good dental care starts at birth. Breast milk, they say, is the best food for the healthy development of teeth. Breast milk can help slow bacterial growth and acid production in the mouth. But dentists say a baby’s gums and early teeth should be cleaned after each feeding. Use a cloth with a little warm water. Experts say if you decide to put your baby to sleep with a bottle, only give the child water.
    When baby teeth begin to appear, you can clean them with a wet toothbrush. Dentists say it is important to find soft toothbrushes made especially for babies and to use them very gently. The use of fluoride (氟化物) to protect teeth is common in many parts of the world. For example, it is often added to drinking water supplies. The fluoride mixes with hard surface on teeth, to help prevent holes from forming.
    But young children often swallow toothpaste when they brush. The American Academy of Pediatric Dentistry notes that swallowing fluoridated toothpaste can cause problems. So young children should be carefully supervised when they brush their teeth. And only a small amount of fluoridated toothpaste, the size of a pea, should be used.
    The American Academy of Family Physicians says most children stop sucking their thumb by the age of four. If it continues, the group advises parents to talk to their child’s dentist or doctor. It could interfere with the correct development of permanent teeth.
    Dentists say children should have their first dental visit at least by the time they are one year old. They say babies should be examined when their first teeth appear—usually at around six months.
What should parents do when young children brush teeth with fluoridated toothpaste?
选项 A、Supervise them carefully.
B、Give them a pea after brushing the teeth.
C、Tell them how to use toothbrush.
D、Help them clean their teeth deeply.
答案A
解析 事实细节题。根据定位句，牙医指出含氟化物的牙膏可能导致一些问题，所以孩子刷牙时，一定要仔细看管。A)含义与之吻合，故为答案。原文说的是孩子应该使用一粒豌豆大的量的含氟牙膏，B)是对原文意思的曲解，故排除；C)和D)在原文中未提及，故排除。
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